Power-head for pumps.



Ii. v. SHULER.

POWER HEAD FOR PUMPS.

APPLICATION FILED MAR. Is. ma.

1 ,288,239. Patented Dec. 17, 1918.

2 SHEETS-SHEET l.

A. y. SHULER. POWER HEAD FOR PUMPS.

APPLICATION FILED MAR.15, 1918.

5288,2539. Pate nted Dec. 17, 1918 2 SHEETS-SHEET 2.

ASA V. SHULER, F JOPLIN, MISSOURI.

POWER-HEAD FOR PUMPS.

Application filed March 15, 1918.

To all whom it may concern:

Be it known that I, As; V. SHULER, a citizen of the United States, residing at Joplin, in the county of Jasper and State of Missouri, have invented new and useful Improvements in PowerHeads for Pumps, of which the following is a specification.

This invention relates to power heads for deep well pumps of the type in which two reciprocating plungers are operated to glve a flow through a single discharge passage,

. the plungcrs being operated by separate ber of strokes per unit of time.

crank connections working at an equal num- The inven tion has for its object to produce an improved apparatus of this nature in whlch the pump pistons are caused to have a relatively slow up-stroke and a relatively quick return or down stroke and to be operated so that there shall be a certain lap in their movements, that is to say, causing them both to move in an upward direction simultaneously during a short period of each stroke, thereby preventing jar on the water column and tending to smoothness and unlformlty of the working of the pump. The particular and preferred arrangement of apparatus by which I secure these results is illustrated in the accompanying drawings. and W111 be described in the following specification.

Referring to the drawings, Figure l is a sideelevation of a pump head embodying my improvements, one side of the upper sup porting frame being removed.

Fig. 2 is a front elevation of the apparatus, the parts being in the positions indicated in Fig. 1. I

Fig. 3 is a top plan view of the apparatus.

In the accompanying drawings 2, 2 indicate supporting sills, suitably placed above a chamber in which is located the bed plate 32, on which rests the connection 35 for the discharge pipe, the drop pipe and the stuffing boxes or glands for the plunger rods. The sills are preferably flanged as represented in Fig. 2 to constitute tracks on which rest the side pieces 3 of the supporting frame, which frame is adapted to slide on the sills to permit the pump head to be moved from directly over the well, when desired. The main drive shaft 4 is supported in the frame 3 and carries a pulley 11, by which it may be belted to a motor, and a pair of spur pinions 10. '5 is the main crank shaft, also supported in the frame, and formed with a central cranked portion Specification of Letters Patent.

Patented Dec. 17, 1918. Serial No. 222,589.

8,and carrying gear wheels 7, 7, that mesh with the pinions 10 and are driven thereby. A shaft 6 that serves as the fulcrum or support for rocking beams l2, 13, 13 is also mounted in the frame 3. The shaft 4 is located between the shafts 5 and 6 and preferably at a lower level. The central rock- 111g beam, 12, is connected with and driven by tho cranked portion 8 of the shaft 5, while the outer rocking beams 13, 13 are driven by the wheels 7, which are provided with wrist pins 9, for such purpose, which pins are disposed diametrically opposite the cranked portion 8 of the shaft 5. Each of the rocking beams is longitudinally slotted, as indicated at 14, the open ends of the slots being closed by removable end pieces, 15, bolted to the beams. The upper faces of the slots 14 are shaped to form slide ways 16,

with which engage the boxes 17 that respectively carry the bearings for the crank I pin of the shaft 5 and for the wrist pins 9.

The central rocking beam is formed on its lower side with a web 18 through which passes a pin 20. Supported on the projecting ends of this pin, and disposed on either side of the web 18, are links 21, 21, pivotally connected at their lower endswith the crosshead 22, to which is connected the central plunger rod The crosshead 22 has lateral extensions 24 carrying bearings 25, throughwhich extend the guide rods 31, the movements of the crosshead being directed by the rods so that they reciprocate on right lines. Each of the out-er rockin beams 13 is formed on its under side with a web 19, that is preferably recessed as indicated at 26. In

each recess extends the upper end of a link 28, these links being connected with the webs 19 by the pins or pivots 27 The lower ends of the links 28 are pivotally connected with a crosshead 29 to which is secured the outer plunger rod 30. The guide rods 31, already referred to, are supported at their lower ends in the bed plate 32, and at their upper ends in bearings 34 carried by the frame 3. If desired the rods may be intermediately supported by bearings 33, carried by the supporting sills or rails 2. The guide rods pass through the lower crosshead 29, which is guided thereby.

It will be seen that the slide boxes 17 in which the driving crank pins have bearing, engage with the rocking beams between the fulcrums of the latter and the pivotal connections of the plunger rods therewith. This gives relatively long movements or strokes to the plunger rods.

l have found that the most at vantageous place for connecting the pump rod with the rocking beam is approximately one-fourth the distance inward from the outer end of the slot in which works the crank pin box, as when thus connected more uniform force is exerted in working the apparatus, and there are less strains on the parts than when the connections are otherwise located.

The crank shaft and the parts it carries being driven in the direction indicated by the arrow (4 in Fig 1, it will be seen that, when the parts occupy he position indicated in this view, the beam 12 and the plunger rod which it actuates are raised to their highest positions; and also that the other beams, 13, have already begun to rise, their lowest positions having been reached when the crank pins 9 that operate them wer at the positions indicated by the star to, now some distance passed. it therefore follows that, altl'iough the crank pins that respec tively operate the beams 12 and 13 are dian'ietrically opposite each other, through a small portion of the revolution of the shaft 5 both beams and the two plunger rods that they operate travel in the same direction, that is, upwardly, thus insuring the lap in the operation of the plungers that is desirable in pumps of the character operated by the apparatus herein shown.

It will also be seen that, owing the disposition of the parts shown and described, the oscillations of the beams will be irregular, they descending faster than they ascend, owing to the fact that that portion of the are followed by the crankpin that causes the descending movement is nearer the fulcrum of the beam than the portion of the are that causes the rip-stroke.

llhat l claim is:

1. A power head for pumps comprising a Gopies of this patent may single crank shaft, two crank wheels mounted thereon, the cranks of the wheels and the cranked portion of the shaft being diametrically opposite each other, three rocking beams supported so as to move about a common axis, the central one being connected with the cranked portion of the shaft and the outer ones with the crank wheels, pump rods, one connected with and driven by the central rocking beam and the other by the outer rocking beams, and means for driving the crank shaft.

2. in a power head for a pump, the com binatien of a supporting frame, a power shaft, a crank shaft, a fulcrum shaft-these shafts being mounted in the frame and all parallel-gear wheels supported on the crank shaft on either side of the cranked portion thereof, crank pins carried by the gear wheels and arranged diametrically opposite the crank pin of the crank shaft, gear pinions on the power shaft meshing with the gearing wheels of the crank shaft and dri i ing the latter, three rocking beams sup ported on the fulcrum shaft, the outer beams being driven by the crank pins of the gear wheels and the central beam by the crank pin of the crank shaft, and two pump ens, oppositely driven from the crank shaft,

being connected with the cranked porthereof and the other with the crank carried by the gear wheels.

in a power head for a pump a driven shaft carrying crank pins, a set of rocking beams with which the pump rods are connected, the beams being longitudinally slotted and open at their ends and the slots beformed with slide ways, slide boxes arranged in the slots of the beams and engaging with the slide ways and formed with bearings for the said crank pins, and removable end pieces for closing the open ends of the rocking beams.

ASA V. SHULER.

the Commissioner of Patents Washington, h. 

